--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/src/cm/media/js/lib/yui/yui3.0.0/build/io/io-debug.js Mon Nov 23 15:14:29 2009 +0100
@@ -0,0 +1,1633 @@
+/*
+Copyright (c) 2009, Yahoo! Inc. All rights reserved.
+Code licensed under the BSD License:
+http://developer.yahoo.net/yui/license.txt
+version: 3.0.0
+build: 1549
+*/
+YUI.add('io-base', function(Y) {
+
+ /**
+ * Base IO functionality. Provides basic XHR transport support.
+ * @module io
+ * @submodule io-base
+ */
+
+ /**
+ * The io class is a utility that brokers HTTP requests through a simplified
+ * interface. Specifically, it allows JavaScript to make HTTP requests to
+ * a resource without a page reload. The underlying transport for making
+ * same-domain requests is the XMLHttpRequest object. YUI.io can also use
+ * Flash, if specified as a transport, for cross-domain requests.
+ *
+ * @class io
+ */
+
+ /**
+ * @event io:start
+ * @description This event is fired by YUI.io when a transaction is initiated.
+ * @type Event Custom
+ */
+ var E_START = 'io:start',
+
+ /**
+ * @event io:complete
+ * @description This event is fired by YUI.io when a transaction is complete.
+ * Response status and data are accessible, if available.
+ * @type Event Custom
+ */
+ E_COMPLETE = 'io:complete',
+
+ /**
+ * @event io:success
+ * @description This event is fired by YUI.io when a transaction is complete, and
+ * the HTTP status resolves to HTTP2xx.
+ * @type Event Custom
+ */
+ E_SUCCESS = 'io:success',
+
+ /**
+ * @event io:failure
+ * @description This event is fired by YUI.io when a transaction is complete, and
+ * the HTTP status resolves to HTTP4xx, 5xx and above.
+ * @type Event Custom
+ */
+ E_FAILURE = 'io:failure',
+
+ /**
+ * @event io:end
+ * @description This event signifies the end of the transaction lifecycle. The
+ * transaction transport is destroyed.
+ * @type Event Custom
+ */
+ E_END = 'io:end',
+
+ //--------------------------------------
+ // Properties
+ //--------------------------------------
+ /**
+ * @description A transaction counter that increments for each transaction.
+ *
+ * @property transactionId
+ * @private
+ * @static
+ * @type int
+ */
+ transactionId = 0,
+
+ /**
+ * @description Object of default HTTP headers to be initialized and sent
+ * for all transactions.
+ *
+ * @property _headers
+ * @private
+ * @static
+ * @type object
+ */
+ _headers = {
+ 'X-Requested-With' : 'XMLHttpRequest'
+ },
+
+ /**
+ * @description Object that stores timeout values for any transaction with
+ * a defined "timeout" configuration property.
+ *
+ * @property _timeout
+ * @private
+ * @static
+ * @type object
+ */
+ _timeout = {},
+
+ // Window reference
+ w = Y.config.win;
+
+ //--------------------------------------
+ // Methods
+ //--------------------------------------
+ /**
+ * @description Method for requesting a transaction. _io() is implemented as
+ * yui.io(). Each transaction may include a configuration object. Its
+ * properties are:
+ *
+ * method: HTTP method verb (e.g., GET or POST). If this property is not
+ * not defined, the default value will be GET.
+ *
+ * data: This is the name-value string that will be sent as the transaction
+ * data. If the request is HTTP GET, the data become part of
+ * querystring. If HTTP POST, the data are sent in the message body.
+ *
+ * xdr: Defines the transport to be used for cross-domain requests. By
+ * setting this property, the transaction will use the specified
+ * transport instead of XMLHttpRequest. Currently, the only alternate
+ * transport supported is Flash (e.g., { xdr: 'flash' }).
+ *
+ * form: This is a defined object used to process HTML form as data. The
+ * properties are:
+ * {
+ * id: object, //HTML form object or id of HTML form
+ * useDisabled: boolean, //Allow disabled HTML form field values
+ * to be sent as part of the data.
+ * }
+ *
+ * on: This is a defined object used to create and handle specific
+ * events during a transaction lifecycle. These events will fire in
+ * addition to the global io events. The events are:
+ * start - This event is fired when a request is sent to a resource.
+ * complete - This event fires when the transaction is complete.
+ * success - This event fires when the response status resolves to
+ * HTTP 2xx.
+ * failure - This event fires when the response status resolves to
+ * HTTP 4xx, 5xx; and, for all transaction exceptions,
+ * including aborted transactions and transaction timeouts.
+ * end - This even is fired at the conclusion of the transaction
+ * lifecycle, after a success or failure resolution.
+ *
+ * The properties are:
+ * {
+ * start: function(id, args){},
+ * complete: function(id, responseobject, args){},
+ * success: function(id, responseobject, args){},
+ * failure: function(id, responseobject, args){},
+ * end: function(id, args){}
+ * }
+ * Each property can reference a function or be written as an
+ * inline function.
+ *
+ * context: Object reference for an event handler when it is implemented
+ * as a method of a base object. Defining "context" will preserve
+ * the proper reference of "this" used in the event handler.
+ * headers: This is a defined object of client headers, as many as.
+ * desired for the transaction. These headers are sentThe object
+ * pattern is:
+ * {
+ * header: value
+ * }
+ *
+ * timeout: This value, defined as milliseconds, is a time threshold for the
+ * transaction. When this threshold is reached, and the transaction's
+ * Complete event has not yet fired, the transaction will be aborted.
+ * arguments: Object, array, string, or number passed to all registered
+ * event handlers. This value is available as the second
+ * argument in the "start" and "abort" event handlers; and, it is
+ * the third argument in the "complete", "success", and "failure"
+ * event handlers.
+ *
+ * @method _io
+ * @private
+ * @static
+ * @param {string} uri - qualified path to transaction resource.
+ * @param {object} c - configuration object for the transaction.
+ * @param {number} i - transaction id, if already set by queue.
+ * @return object
+ */
+ function _io(uri, c, i) {
+ var f, o, m;
+ c = c || {};
+ o = _create(c.xdr || c.form, i);
+ m = c.method ? c.method.toUpperCase() : 'GET';
+
+ if (c.form) {
+ if (c.form.upload) {
+ return Y.io._upload(o, uri, c);
+ }
+ else {
+ f = Y.io._serialize(c.form, c.data);
+ if (m === 'POST') {
+ c.data = f;
+ _setHeader('Content-Type', 'application/x-www-form-urlencoded');
+ }
+ else if (m === 'GET') {
+ uri = _concat(uri, f);
+ }
+ }
+ }
+ else if (c.data && m === 'GET') {
+ uri = _concat(uri, c.data);
+ }
+
+ if (c.xdr) {
+ if (c.xdr.use === 'native' && window.XDomainRequest || c.xdr.use === 'flash') {
+ return Y.io.xdr(uri, o, c);
+ }
+ if (c.xdr.credentials) {
+ o.c.withCredentials = true;
+ }
+ }
+
+ o.c.onreadystatechange = function() { _readyState(o, c); };
+ try {
+ o.c.open(m, uri, true);
+ }
+ catch(e0){
+ if (c.xdr) {
+ // This exception is usually thrown by browsers
+ // that do not support native XDR transactions.
+ return _resend(o, uri, c);
+ }
+ }
+
+ if (c.data && m === 'POST') {
+ _setHeader('Content-Type', 'application/x-www-form-urlencoded; charset=UTF-8');
+ }
+
+ _setHeaders(o.c, c.headers || {});
+ try {
+ // Using "null" will result in a POST request with
+ // no Content-Length defined.
+ o.c.send(c.data || '');
+ }
+ catch(e1) {
+ if (c.xdr) {
+ // This exception is usually thrown by browsers
+ // that do not support native XDR transactions.
+ return _resend(o, uri, c);
+ }
+ }
+
+ _ioStart(o.id, c);
+ // If config.timeout is defined, and the request is standard XHR,
+ // initialize timeout polling.
+ if (c.timeout) {
+ _startTimeout(o, c.timeout);
+ }
+
+ return {
+ id: o.id,
+ abort: function() {
+ return o.c ? _ioCancel(o, 'abort') : false;
+ },
+ isInProgress: function() {
+ return o.c ? o.c.readyState !== 4 && o.c.readyState !== 0 : false;
+ }
+ }
+ }
+
+ /**
+ * @description Method for creating and subscribing transaction events.
+ *
+ * @method _subscribe
+ * @private
+ * @static
+ * @param {string} e - event to be published
+ * @param {object} c - configuration data subset for event subscription.
+ *
+ * @return void
+ */
+ function _subscribe(e, c){
+ var evt = new Y.EventTarget().publish('transaction:' + e);
+ evt.subscribe(c.on[e], (c.context || Y), c.arguments);
+
+ return evt;
+ }
+
+ /**
+ * @description Fires event "io:start" and creates, fires a
+ * transaction-specific start event, if config.on.start is
+ * defined.
+ *
+ * @method _ioStart
+ * @private
+ * @static
+ * @param {number} id - transaction id
+ * @param {object} c - configuration object for the transaction.
+ *
+ * @return void
+ */
+ function _ioStart(id, c) {
+ var evt;
+ // Set default value of argument c, property "on" to Object if
+ // the property is null or undefined.
+ c.on = c.on || {};
+
+ Y.fire(E_START, id);
+ if (c.on.start) {
+ evt = _subscribe('start', c);
+ evt.fire(id);
+ }
+ }
+
+
+ /**
+ * @description Fires event "io:complete" and creates, fires a
+ * transaction-specific "complete" event, if config.on.complete is
+ * defined.
+ *
+ * @method _ioComplete
+ * @private
+ * @static
+ * @param {object} o - transaction object.
+ * @param {object} c - configuration object for the transaction.
+ *
+ * @return void
+ */
+ function _ioComplete(o, c) {
+ var evt,
+ r = o.status ? { status: 0, statusText: o.status } : o.c;
+ // Set default value of argument c, property "on" to Object if
+ // the property is null or undefined.
+ c.on = c.on || {};
+
+ Y.fire(E_COMPLETE, o.id, r);
+ if (c.on.complete) {
+ evt = _subscribe('complete', c);
+ evt.fire(o.id, r);
+ }
+ }
+
+ /**
+ * @description Fires event "io:success" and creates, fires a
+ * transaction-specific "success" event, if config.on.success is
+ * defined.
+ *
+ * @method _ioSuccess
+ * @private
+ * @static
+ * @param {object} o - transaction object.
+ * @param {object} c - configuration object for the transaction.
+ *
+ * @return void
+ */
+ function _ioSuccess(o, c) {
+ var evt;
+ // Set default value of argument c, property "on" to Object if
+ // the property is null or undefined.
+ c.on = c.on || {};
+
+ Y.fire(E_SUCCESS, o.id, o.c);
+ if (c.on.success) {
+ evt = _subscribe('success', c);
+ evt.fire(o.id, o.c);
+ }
+
+ _ioEnd(o, c);
+ }
+
+ /**
+ * @description Fires event "io:failure" and creates, fires a
+ * transaction-specific "failure" event, if config.on.failure is
+ * defined.
+ *
+ * @method _ioFailure
+ * @private
+ * @static
+ * @param {object} o - transaction object.
+ * @param {object} c - configuration object for the transaction.
+ *
+ * @return void
+ */
+ function _ioFailure(o, c) {
+ var evt,
+ r = o.status ? { status: 0, statusText: o.status } : o.c;
+ // Set default value of argument c, property "on" to Object if
+ // the property is null or undefined.
+ c.on = c.on || {};
+
+ Y.fire(E_FAILURE, o.id, r);
+ if (c.on.failure) {
+ evt = _subscribe('failure', c);
+ evt.fire(o.id, r);
+ }
+
+ _ioEnd(o, c);
+ }
+
+ /**
+ * @description Fires event "io:end" and creates, fires a
+ * transaction-specific "end" event, if config.on.end is
+ * defined.
+ *
+ * @method _ioEnd
+ * @private
+ * @static
+ * @param {object} o - transaction object.
+ * @param {object} c - configuration object for the transaction.
+ *
+ * @return void
+ */
+ function _ioEnd(o, c) {
+ var evt;
+ // Set default value of argument c, property "on" to Object if
+ // the property is null or undefined.
+ c.on = c.on || {};
+
+ Y.fire(E_END, o.id);
+ if (c.on.end) {
+ evt = _subscribe('end', c);
+ evt.fire(o.id);
+ }
+
+ _destroy(o, c.xdr ? true : false );
+ }
+
+ /**
+ * @description Terminates a transaction due to an explicit abort or
+ * timeout.
+ *
+ * @method _ioCancel
+ * @private
+ * @static
+ * @param {object} o - Transaction object generated by _create().
+ * @param {string} s - Identifies timed out or aborted transaction.
+ *
+ * @return void
+ */
+ function _ioCancel(o, s) {
+ if (o && o.c) {
+ o.status = s;
+ o.c.abort();
+ }
+ }
+
+ /**
+ * @description Resends an XDR transaction, using the Flash tranport,
+ * if the native transport fails.
+ *
+ * @method _resend
+ * @private
+ * @static
+
+ * @param {object} o - Transaction object generated by _create().
+ * @param {string} uri - qualified path to transaction resource.
+ * @param {object} c - configuration object for the transaction.
+ *
+ * @return void
+ */
+ function _resend(o, uri, c) {
+ var id = parseInt(o.id);
+
+ _destroy(o);
+ c.xdr.use = 'flash';
+
+ return Y.io(uri, c, id);
+ }
+
+ /**
+ * @description Method that increments _transactionId for each transaction.
+ *
+ * @method _id
+ * @private
+ * @static
+ * @return int
+ */
+ function _id() {
+ var id = transactionId;
+
+ transactionId++;
+
+ return id;
+ }
+
+ /**
+ * @description Method that creates a unique transaction object for each
+ * request.
+ *
+ * @method _create
+ * @private
+ * @static
+ * @param {number} c - configuration object subset to determine if
+ * the transaction is an XDR or file upload,
+ * requiring an alternate transport.
+ * @param {number} i - transaction id
+ * @return object
+ */
+ function _create(c, i) {
+ var o = {};
+ o.id = Y.Lang.isNumber(i) ? i : _id();
+ c = c || {};
+
+ if (!c.use && !c.upload) {
+ o.c = _xhr();
+ }
+ else if (c.use) {
+ if (c.use === 'flash') {
+ o.c = Y.io._transport[c.use];
+ }
+ else if (c.use === 'native' && window.XDomainRequest) {
+ o.c = new XDomainRequest();
+ }
+ else {
+ o.c = _xhr();
+ }
+ }
+ else {
+ o.c = {};
+ }
+
+ return o;
+ };
+
+ /**
+ * @description Method that creates the XMLHttpRequest transport
+ *
+ * @method _xhr
+ * @private
+ * @static
+ * @return object
+ */
+ function _xhr() {
+ return w.XMLHttpRequest ? new XMLHttpRequest() : new ActiveXObject('Microsoft.XMLHTTP');
+ }
+
+ /**
+ * @description Method that concatenates string data for HTTP GET transactions.
+ *
+ * @method _concat
+ * @private
+ * @static
+ * @param {string} s - URI or root data.
+ * @param {string} d - data to be concatenated onto URI.
+ * @return int
+ */
+ function _concat(s, d) {
+ s += ((s.indexOf('?') == -1) ? '?' : '&') + d;
+ return s;
+ }
+
+ /**
+ * @description Method that stores default client headers for all transactions.
+ * If a label is passed with no value argument, the header will be deleted.
+ *
+ * @method _setHeader
+ * @private
+ * @static
+ * @param {string} l - HTTP header
+ * @param {string} v - HTTP header value
+ * @return int
+ */
+ function _setHeader(l, v) {
+ if (v) {
+ _headers[l] = v;
+ }
+ else {
+ delete _headers[l];
+ }
+ }
+
+ /**
+ * @description Method that sets all HTTP headers to be sent in a transaction.
+ *
+ * @method _setHeaders
+ * @private
+ * @static
+ * @param {object} o - XHR instance for the specific transaction.
+ * @param {object} h - HTTP headers for the specific transaction, as defined
+ * in the configuration object passed to YUI.io().
+ * @return void
+ */
+ function _setHeaders(o, h) {
+ var p;
+
+ for (p in _headers) {
+ if (_headers.hasOwnProperty(p)) {
+ if (h[p]) {
+ // Configuration headers will supersede IO preset headers,
+ // if headers match.
+ break;
+ }
+ else {
+ h[p] = _headers[p];
+ }
+ }
+ }
+
+ for (p in h) {
+ if (h.hasOwnProperty(p)) {
+ o.setRequestHeader(p, h[p]);
+ }
+ }
+ }
+
+ /**
+ * @description Starts timeout count if the configuration object
+ * has a defined timeout property.
+ *
+ * @method _startTimeout
+ * @private
+ * @static
+ * @param {object} o - Transaction object generated by _create().
+ * @param {object} c - Configuration object passed to YUI.io().
+ * @return void
+ */
+ function _startTimeout(o, timeout) {
+ _timeout[o.id] = w.setTimeout(function() { _ioCancel(o, 'timeout'); }, timeout);
+ }
+
+ /**
+ * @description Clears the timeout interval started by _startTimeout().
+ *
+ * @method _clearTimeout
+ * @private
+ * @static
+ * @param {number} id - Transaction id.
+ * @return void
+ */
+ function _clearTimeout(id) {
+ w.clearTimeout(_timeout[id]);
+ delete _timeout[id];
+ }
+
+ /**
+ * @description Event handler bound to onreadystatechange.
+ *
+ * @method _readyState
+ * @private
+ * @static
+ * @param {object} o - Transaction object generated by _create().
+ * @param {object} c - Configuration object passed to YUI.io().
+ * @return void
+ */
+ function _readyState(o, c) {
+ if (o.c.readyState === 4) {
+ if (c.timeout) {
+ _clearTimeout(o.id);
+ }
+
+ w.setTimeout(
+ function() {
+ _ioComplete(o, c);
+ _handleResponse(o, c);
+ }, 0);
+ }
+ }
+
+ /**
+ * @description Method that determines if a transaction response qualifies
+ * as success or failure, based on the response HTTP status code, and
+ * fires the appropriate success or failure events.
+ *
+ * @method _handleResponse
+ * @private
+ * @static
+ * @param {object} o - Transaction object generated by _create().
+ * @param {object} c - Configuration object passed to io().
+ * @return void
+ */
+ function _handleResponse(o, c) {
+ var status;
+ try{
+ if (o.c.status && o.c.status !== 0) {
+ status = o.c.status;
+ }
+ else {
+ status = 0;
+ }
+ }
+ catch(e) {
+ status = 0;
+ }
+
+ // IE reports HTTP 204 as HTTP 1223.
+ if (status >= 200 && status < 300 || status === 1223) {
+ _ioSuccess(o, c);
+ }
+ else {
+ _ioFailure(o, c);
+ }
+ }
+
+ function _destroy(o, transport) {
+ // IE, when using XMLHttpRequest as an ActiveX Object, will throw
+ // a "Type Mismatch" error if the event handler is set to "null".
+ if(w.XMLHttpRequest && !transport) {
+ if (o.c) {
+ o.c.onreadystatechange = null;
+ }
+ }
+
+ o.c = null;
+ o = null;
+ }
+
+ _io.start = _ioStart;
+ _io.complete = _ioComplete;
+ _io.success = _ioSuccess;
+ _io.failure = _ioFailure;
+ _io.end = _ioEnd;
+ _io._id = _id;
+ _io._timeout = _timeout;
+
+ //--------------------------------------
+ // Begin public interface definition
+ //--------------------------------------
+ /**
+ * @description Method that stores default client headers for all transactions.
+ * If a label is passed with no value argument, the header will be deleted.
+ * This is the interface for _setHeader().
+ *
+ * @method header
+ * @public
+ * @static
+ * @param {string} l - HTTP header
+ * @param {string} v - HTTP header value
+ * @return int
+ */
+ _io.header = _setHeader;
+
+ /**
+ * @description Method for requesting a transaction. This
+ * is the interface for _io().
+ *
+ * @method io
+ * @public
+ * @static
+ * @param {string} uri - qualified path to transaction resource.
+ * @param {object} c - configuration object for the transaction.
+ * @return object
+ */
+ Y.io = _io;
+ Y.io.http = _io;
+
+
+
+}, '3.0.0' ,{requires:['event-custom-base']});
+
+YUI.add('io-form', function(Y) {
+
+ /**
+ * Extends the IO base class to enable HTML form data serialization, when specified
+ * in the transaction's configuration object.
+ * @module io
+ * @submodule io-form
+ */
+
+ Y.mix(Y.io, {
+ /**
+ * @description Method to enumerate through an HTML form's elements collection
+ * and return a string comprised of key-value pairs.
+ *
+ * @method _serialize
+ * @private
+ * @static
+ * @param {object} c - YUI form node or HTML form id.
+ * @param {string} s - Transaction data defined in the configuration.
+ * @return string
+ */
+ _serialize: function(c, s) {
+ var eUC = encodeURIComponent,
+ data = [],
+ useDf = c.useDisabled || false,
+ item = 0,
+ id = (typeof c.id === 'string') ? c.id : c.id.getAttribute('id'),
+ e, f, n, v, d, i, il, j, jl, o;
+
+ if (!id) {
+ id = Y.guid('io:');
+ c.id.setAttribute('id', id);
+ }
+
+ f = Y.config.doc.getElementById(id);
+
+ // Iterate over the form elements collection to construct the
+ // label-value pairs.
+ for (i = 0, il = f.elements.length; i < il; ++i) {
+ e = f.elements[i];
+ d = e.disabled;
+ n = e.name;
+
+ if ((useDf) ? n : (n && !d)) {
+ n = encodeURIComponent(n) + '=';
+ v = encodeURIComponent(e.value);
+
+ switch (e.type) {
+ // Safari, Opera, FF all default options.value from .text if
+ // value attribute not specified in markup
+ case 'select-one':
+ if (e.selectedIndex > -1) {
+ o = e.options[e.selectedIndex];
+ data[item++] = n + eUC((o.attributes.value && o.attributes.value.specified) ? o.value : o.text);
+ }
+ break;
+ case 'select-multiple':
+ if (e.selectedIndex > -1) {
+ for (j = e.selectedIndex, jl = e.options.length; j < jl; ++j) {
+ o = e.options[j];
+ if (o.selected) {
+ data[item++] = n + eUC((o.attributes.value && o.attributes.value.specified) ? o.value : o.text);
+ }
+ }
+ }
+ break;
+ case 'radio':
+ case 'checkbox':
+ if(e.checked){
+ data[item++] = n + v;
+ }
+ break;
+ case 'file':
+ // stub case as XMLHttpRequest will only send the file path as a string.
+ case undefined:
+ // stub case for fieldset element which returns undefined.
+ case 'reset':
+ // stub case for input type reset button.
+ case 'button':
+ // stub case for input type button elements.
+ break;
+ case 'submit':
+ default:
+ data[item++] = n + v;
+ }
+ }
+ }
+ Y.log('HTML form serialized. The value is: ' + data.join('&'), 'info', 'io');
+ return s ? data.join('&') + "&" + s : data.join('&');
+ }
+ }, true);
+
+
+
+}, '3.0.0' ,{requires:['io-base','node-base','node-style']});
+
+YUI.add('io-xdr', function(Y) {
+
+ /**
+ * Extends the IO base class to provide an alternate, Flash transport, for making
+ * cross-domain requests.
+ * @module io
+ * @submodule io-xdr
+ */
+
+ /**
+ * @event io:xdrReady
+ * @description This event is fired by YUI.io when the specified transport is
+ * ready for use.
+ * @type Event Custom
+ */
+ var E_XDR_READY = 'io:xdrReady',
+
+
+ /**
+ * @description Object that stores callback handlers for cross-domain requests
+ * when using Flash as the transport.
+ *
+ * @property _fn
+ * @private
+ * @static
+ * @type object
+ */
+ _fn = {},
+
+ /**
+ * @description Map of transaction state used when XDomainRequest is the
+ * XDR transport.
+ *
+ * @property _rS
+ * @private
+ * @static
+ * @type object
+ */
+ _rS = {};
+
+ /**
+ * @description Method that creates the Flash transport swf.
+ *
+ * @method _swf
+ * @private
+ * @static
+ * @param {string} uri - location of io.swf.
+ * @param {string} yid - YUI instance id.
+ * @return void
+ */
+ function _swf(uri, yid) {
+ var o = '<object id="yuiIoSwf" type="application/x-shockwave-flash" data="' +
+ uri + '" width="0" height="0">' +
+ '<param name="movie" value="' + uri + '">' +
+ '<param name="FlashVars" value="yid=' + yid + '">' +
+ '<param name="allowScriptAccess" value="always">' +
+ '</object>',
+ c = document.createElement('div');
+
+ document.body.appendChild(c);
+ c.innerHTML = o;
+ }
+
+ /**
+ * @description Sets event handlers for XDomainRequest transactions.
+ *
+ * @method _xdr
+ * @private
+ * @static
+ * @param {object} o - Transaction object generated by _create() in io-base.
+ * @param {object} c - configuration object for the transaction.
+ * @return void
+ */
+ function _xdr(o, c) {
+ o.c.onprogress = function() { _rS[o.id] = 3; }
+ o.c.onload = function() {
+ _rS[o.id] = 4;
+ Y.io.xdrResponse(o, c, 'success');
+ };
+ o.c.onerror = function() {
+ _rS[o.id] = 4;
+ Y.io.xdrResponse(o, c, 'failure');
+ };
+ if (c.timeout) {
+ o.c.ontimeout = function() {
+ _rS[o.id] = 4;
+ Y.io.xdrResponse(o, c, 'timeout');
+ };
+ o.c.timeout = c.timeout;
+ }
+ }
+
+ /**
+ * @description Creates a response object for XDR transactions, for success
+ * and failure cases.
+ *
+ * @method _data
+ * @private
+ * @static
+ * @param {object} o - Transaction object generated by _create() in io-base.
+ * @param {boolean} isFlash - True if Flash was used as the transport.
+ * @param {boolean} isXML - True if the response data are XML.
+ *
+ * @return object
+ */
+ function _data(o, isFlash, isXML) {
+ var text, xml;
+
+ if (!o.status) {
+ text = isFlash ? decodeURI(o.c.responseText) : o.c.responseText;
+ xml = isXML ? Y.DataType.XML.parse(text) : null;
+
+ return { id: o.id, c: { responseText: text, responseXML: xml } };
+ }
+ else {
+ return { id: o.id, status: o.status };
+ }
+
+ }
+
+ /**
+ * @description Method for intiating an XDR transaction abort.
+ *
+ * @method _abort
+ * @private
+ * @static
+ * @param {object} o - Transaction object generated by _create() in io-base.
+ * @param {object} c - configuration object for the transaction.
+ */
+ function _abort(o, c) {
+ return c.xdr.use === 'flash' ? o.c.abort(o.id, c) : o.c.abort();
+ }
+
+ /**
+ * @description Method for determining if an XDR transaction has completed
+ * and all data are received.
+ *
+ * @method _isInProgress.
+ * @private
+ * @static
+ * @param {object} o - Transaction object generated by _create() in io-base.
+ * @param {object} c - configuration object for the transaction.
+ */
+ function _isInProgress(o, t) {
+ return (t === 'flash' && o.c) ? o.c.isInProgress(o.id) : _rS[o.id] !== 4;
+ }
+
+ Y.mix(Y.io, {
+
+ /**
+ * @description Map of io transports.
+ *
+ * @property _transport
+ * @private
+ * @static
+ * @type object
+ */
+ _transport: {},
+
+ /**
+ * @description Method for accessing the transport's interface for making a
+ * cross-domain transaction.
+ *
+ * @method _xdr
+ * @private
+ * @static
+ * @param {string} uri - qualified path to transaction resource.
+ * @param {object} o - Transaction object generated by _create() in io-base.
+ * @param {object} c - configuration object for the transaction.
+ */
+ xdr: function(uri, o, c) {
+ if (c.on && c.xdr.use === 'flash') {
+ _fn[o.id] = {
+ on: c.on,
+ context: c.context,
+ arguments: c.arguments
+ };
+ // These nodes do not need to be serialized across Flash's
+ // ExternalInterface. Doing so will result in exceptions.
+ c.context = null;
+ c.form = null;
+
+ o.c.send(uri, c, o.id);
+ }
+ else if (window.XDomainRequest) {
+ _xdr(o, c);
+ o.c.open(c.method || 'GET', uri);
+ o.c.send(c.data);
+ }
+
+ return {
+ id: o.id,
+ abort: function() {
+ return o.c ? _abort(o, c) : false;
+ },
+ isInProgress: function() {
+ return o.c ? _isInProgress(o, c.xdr.use) : false;
+ }
+ }
+ },
+
+ /**
+ * @description Response controller for cross-domain requests when using the
+ * Flash transport or IE8's XDomainRequest object.
+ *
+ * @method xdrResponse
+ * @private
+ * @static
+ * @param {object} o - Transaction object generated by _create() in io-base.
+ * @param {object} c - configuration object for the transaction.
+ * @param {string} e - Event name
+ * @return object
+ */
+ xdrResponse: function(o, c, e) {
+ var m, fn,
+ isFlash = c.xdr.use === 'flash' ? true : false,
+ isXML = c.xdr.dataType === 'xml' ? true : false;
+ c.on = c.on || {};
+
+ if (isFlash) {
+ m = _fn || {};
+ fn = m[o.id] ? m[o.id] : null;
+ if (fn) {
+ c.on = fn.on;
+ c.context = fn.context;
+ c.arguments = fn.arguments;
+ }
+ }
+ if (e === ('abort' || 'timeout')) {
+ o.status = e;
+ }
+
+ switch (e) {
+ case 'start':
+ Y.io.start(o.id, c);
+ break;
+ case 'success':
+ Y.io.success(_data(o, isFlash, isXML), c);
+ isFlash ? delete m[o.id] : delete _rS[o.id];
+ break;
+ case 'timeout':
+ case 'abort':
+ case 'failure':
+ Y.io.failure(_data(o, isFlash, isXML), c);
+ isFlash ? delete m[o.id] : delete _rS[o.id];
+ break;
+ }
+ },
+
+ /**
+ * @description Fires event "io:xdrReady"
+ *
+ * @method xdrReady
+ * @private
+ * @static
+ * @param {number} id - transaction id
+ * @param {object} c - configuration object for the transaction.
+ *
+ * @return void
+ */
+ xdrReady: function(id) {
+ Y.fire(E_XDR_READY, id);
+ },
+
+ /**
+ * @description Method to initialize the desired transport.
+ *
+ * @method transport
+ * @public
+ * @static
+ * @param {object} o - object of transport configurations.
+ * @return void
+ */
+ transport: function(o) {
+ var id = o.yid ? o.yid : Y.id;
+
+ _swf(o.src, id);
+ this._transport.flash = Y.config.doc.getElementById('yuiIoSwf');
+ }
+ });
+
+
+
+}, '3.0.0' ,{requires:['io-base','datatype-xml']});
+
+YUI.add('io-upload-iframe', function(Y) {
+
+ /**
+ * Extends the IO base class to enable file uploads, with HTML forms,
+ * using an iframe as the transport medium.
+ * @module io
+ * @submodule io-upload-iframe
+ */
+
+ var w = Y.config.win;
+ /**
+ * @description Parses the POST data object and creates hidden form elements
+ * for each key-value, and appends them to the HTML form object.
+ * @method appendData
+ * @private
+ * @static
+ * @param {object} f HTML form object.
+ * @param {string} s The key-value POST data.
+ * @return {array} o Array of created fields.
+ */
+ function _addData(f, s) {
+ var o = [],
+ m = s.split('='),
+ i, l;
+
+ for (i = 0, l = m.length - 1; i < l; i++) {
+ o[i] = document.createElement('input');
+ o[i].type = 'hidden';
+ o[i].name = m[i].substring(m[i].lastIndexOf('&') + 1);
+ o[i].value = (i + 1 === l) ? m[i + 1] : m[i + 1].substring(0, (m[i + 1].lastIndexOf('&')));
+ f.appendChild(o[i]);
+ Y.log('key: ' + o[i].name + ' and value: ' + o[i].value + ' added as form data.', 'info', 'io');
+ }
+
+ return o;
+ }
+
+ /**
+ * @description Removes the custom fields created to pass additional POST
+ * data, along with the HTML form fields.
+ * @method f
+ * @private
+ * @static
+ * @param {object} f HTML form object.
+ * @param {object} o HTML form fields created from configuration.data.
+ * @return {void}
+ */
+ function _removeData(f, o) {
+ var i, l;
+
+ for(i = 0, l = o.length; i < l; i++){
+ f.removeChild(o[i]);
+ }
+ }
+
+ /**
+ * @description Sets the appropriate attributes and values to the HTML
+ * form, in preparation of a file upload transaction.
+ * @method _setAttrs
+ * @private
+ * @static
+ * @param {object} f HTML form object.
+ * @param {object} id The Transaction ID.
+ * @param {object} uri Qualified path to transaction resource.
+ * @return {void}
+ */
+ function _setAttrs(f, id, uri) {
+ var ie8 = (document.documentMode && document.documentMode === 8) ? true : false;
+
+ f.setAttribute('action', uri);
+ f.setAttribute('method', 'POST');
+ f.setAttribute('target', 'ioupload' + id );
+ f.setAttribute(Y.UA.ie && !ie8 ? 'encoding' : 'enctype', 'multipart/form-data');
+ }
+
+ /**
+ * @description Sets the appropriate attributes and values to the HTML
+ * form, in preparation of a file upload transaction.
+ * @method _resetAttrs
+ * @private
+ * @static
+ * @param {object} f HTML form object.
+ * @param {object} a Object of original attributes.
+ * @return {void}
+ */
+ function _resetAttrs(f, a){
+ var p;
+
+ for (p in a) {
+ if (a.hasOwnProperty(a, p)) {
+ if (a[p]) {
+ f.setAttribute(p, f[p]);
+ }
+ else {
+ f.removeAttribute(p);
+ }
+ }
+ }
+ }
+
+ /**
+ * @description Creates the iframe transported used in file upload
+ * transactions, and binds the response event handler.
+ *
+ * @method _create
+ * @private
+ * @static
+ * @param {object} o Transaction object generated by _create().
+ * @param {object} c Configuration object passed to YUI.io().
+ * @return {void}
+ */
+ function _create(o, c) {
+ var i = Y.Node.create('<iframe id="ioupload' + o.id + '" name="ioupload' + o.id + '" />');
+ i._node.style.position = 'absolute';
+ i._node.style.top = '-1000px';
+ i._node.style.left = '-1000px';
+
+ Y.one('body').appendChild(i);
+ // Bind the onload handler to the iframe to detect the file upload response.
+ Y.on("load", function() { _handle(o, c) }, '#ioupload' + o.id);
+ }
+
+ /**
+ * @description Bound to the iframe's Load event and processes
+ * the response data.
+ * @method _handle
+ * @private
+ * @static
+ * @param {o} o The transaction object
+ * @param {object} c Configuration object for the transaction.
+ * @return {void}
+ */
+ function _handle(o, c) {
+ var d = Y.one('#ioupload' + o.id).get('contentWindow.document'),
+ b = d.one('body'),
+ xml = (d._node.nodeType === 9),
+ p;
+
+ if (c.timeout) {
+ _clearTimeout(o.id);
+ }
+
+ if (b) {
+ // When a response Content-Type of "text/plain" is used, Firefox and Safari
+ // will wrap the response string with <pre></pre>.
+ p = b.query('pre:first-child');
+ o.c.responseText = p ? p.get('innerHTML') : b.get('innerHTML');
+ Y.log('The responseText value for transaction ' + o.id + ' is: ' + o.c.responseText + '.', 'info', 'io');
+ }
+ else if (xml) {
+ o.c.responseXML = d._node;
+ Y.log('The response for transaction ' + o.id + ' is an XML document.', 'info', 'io');
+ }
+
+ Y.io.complete(o, c);
+ Y.io.end(o, c);
+ // The transaction is complete, so call _destroy to remove
+ // the event listener bound to the iframe transport, and then
+ // destroy the iframe.
+ w.setTimeout( function() { _destroy(o.id); }, 0);
+ }
+
+ /**
+ * @description Starts timeout count if the configuration object
+ * has a defined timeout property.
+ *
+ * @method _startTimeout
+ * @private
+ * @static
+ * @param {object} o Transaction object generated by _create().
+ * @param {object} c Configuration object passed to YUI.io().
+ * @return {void}
+ */
+ function _startTimeout(o, c) {
+ Y.io._timeout[o.id] = w.setTimeout(
+ function() {
+ var r = { id: o.id, status: 'timeout' };
+
+ Y.io.complete(r, c);
+ Y.io.end(r, c);
+ Y.log('Transaction ' + o.id + ' timeout.', 'info', 'io');
+ }, c.timeout);
+ }
+
+ /**
+ * @description Clears the timeout interval started by _startTimeout().
+ * @method _clearTimeout
+ * @private
+ * @static
+ * @param {number} id - Transaction ID.
+ * @return {void}
+ */
+ function _clearTimeout(id) {
+ w.clearTimeout(Y.io._timeout[id]);
+ delete Y.io._timeout[id];
+ }
+
+ /**
+ * @description
+ * @method _destroy
+ * @private
+ * @static
+ * @param {o} o The transaction object
+ * @param {object} uri Qualified path to transaction resource.
+ * @param {object} c Configuration object for the transaction.
+ * @return {void}
+ */
+ function _destroy(id) {
+ Y.Event.purgeElement('#ioupload' + id, false);
+ Y.one('body').removeChild(Y.one('#ioupload' + id));
+ Y.log('The iframe transport for transaction ' + id + ' has been destroyed.', 'info', 'io');
+ }
+
+ Y.mix(Y.io, {
+ /**
+ * @description Uploads HTML form data, inclusive of files/attachments,
+ * using the iframe created in _create to facilitate the transaction.
+ * @method _upload
+ * @private
+ * @static
+ * @param {o} o The transaction object
+ * @param {object} uri Qualified path to transaction resource.
+ * @param {object} c Configuration object for the transaction.
+ * @return {void}
+ */
+ _upload: function(o, uri, c) {
+ var f = (typeof c.form.id === 'string') ? Y.config.doc.getElementById(c.form.id) : c.form.id,
+ fields,
+ // Track original HTML form attribute values.
+ attr = {
+ action: f.getAttribute('action'),
+ target: f.getAttribute('target')
+ };
+
+ _create(o, c);
+ // Initialize the HTML form properties in case they are
+ // not defined in the HTML form.
+ _setAttrs(f, o.id, uri);
+ if (c.data) {
+ fields = _addData(f, c.data);
+ }
+
+ // Start polling if a callback is present and the timeout
+ // property has been defined.
+ if (c.timeout) {
+ _startTimeout(o, c);
+ Y.log('Transaction timeout started for transaction ' + o.id + '.', 'info', 'io');
+ }
+
+ // Start file upload.
+ f.submit();
+ Y.io.start(o.id, c);
+ if (c.data) {
+ _removeData(f, fields);
+ }
+ // Restore HTML form attributes to their original values.
+ _resetAttrs(f, attr);
+
+ return {
+ id: o.id,
+ abort: function() {
+ var r = { id: o.id, status: 'abort' };
+
+ if (Y.one('#ioupload' + o.id)) {
+ _destroy(o.id);
+ Y.io.complete(r, c);
+ Y.io.end(r, c);
+ Y.log('Transaction ' + o.id + ' aborted.', 'info', 'io');
+ }
+ else {
+ Y.log('Attempted to abort transaction ' + o.id + ' but transaction has completed.', 'info', 'io');
+ return false;
+ }
+ },
+ isInProgress: function() {
+ return Y.one('#ioupload' + o.id) ? true : false;
+ }
+ }
+ }
+ });
+
+
+
+}, '3.0.0' ,{requires:['io-base','node-base','event-base']});
+
+YUI.add('io-queue', function(Y) {
+
+ /**
+ * Extends the IO base class to implement Queue for synchronous
+ * transaction processing.
+ * @module io
+ * @submodule io-queue
+ */
+
+ /**
+ * @description Array of transactions queued for processing
+ *
+ * @property _yQ
+ * @private
+ * @static
+ * @type Object
+ */
+ var _q = new Y.Queue(),
+
+ /**
+ * @description Reference to "io:complete" event handler.
+ *
+ * @property _e
+ * @private
+ * @static
+ * @type Object
+ */
+ _e,
+
+ _activeId,
+ /**
+ * @description Property to determine whether the queue is set to
+ * 1 (active) or 0 (inactive). When inactive, transactions
+ * will be stored in the queue until the queue is set to active.
+ *
+ * @property _qState
+ * @private
+ * @static
+ * @type int
+ */
+ _qState = 1;
+
+ /**
+ * @description Method for requesting a transaction, and queueing the
+ * request before it is sent to the resource.
+ *
+ * @method _queue
+ * @private
+ * @static
+ * @return Object
+ */
+ function _queue(uri, c) {
+ var o = { uri: uri, id: Y.io._id(), cfg:c };
+
+ _q.add(o);
+ if (_qState === 1) {
+ _shift();
+ }
+
+ Y.log('Object queued. Transaction id is ' + o.id, 'info', 'io');
+ return o;
+ }
+
+ /**
+ * @description Method Process the first transaction from the
+ * queue in FIFO order.
+ *
+ * @method _shift
+ * @private
+ * @static
+ * @return void
+ */
+ function _shift() {
+ var o = _q.next();
+
+ _activeId = o.id;
+ _qState = 0;
+ Y.io(o.uri, o.cfg, o.id);
+ }
+
+ /**
+ * @description Method for promoting a transaction to the top of the queue.
+ *
+ * @method _unshift
+ * @private
+ * @static
+ * @return void
+ */
+ function _unshift(o) {
+ _q.promote(o);
+ }
+
+ function _next(id) {
+ _qState = 1;
+ if (_activeId === id && _q.size() > 0) {
+ _shift();
+ }
+ }
+
+ /**
+ * @description Method for removing a specific, pending transaction from
+ * the queue.
+ *
+ * @method _remove
+ * @private
+ * @static
+ * @return void
+ */
+ function _remove(o) {
+ _q.remove(o);
+ }
+
+ function _start() {
+ _qState = 1;
+
+ if (_q.size() > 0) {
+ _shift();
+ }
+ Y.log('Queue started.', 'info', 'io');
+ }
+
+ /**
+ * @description Method for setting queue processing to inactive.
+ * Transaction requests to YUI.io.queue() will be stored in the queue, but
+ * not processed until the queue is reset to "active".
+ *
+ * @method _stop
+ * @private
+ * @static
+ * @return void
+ */
+ function _stop() {
+ _qState = 0;
+ Y.log('Queue stopped.', 'info', 'io');
+ };
+
+ /**
+ * @description Method to query the current size of the queue.
+ *
+ * @method _size
+ * @private
+ * @static
+ * @return int
+ */
+ function _size() {
+ return _q.size();
+ };
+
+ _e = Y.on('io:complete', function(id) { _next(id); }, Y.io);
+
+ /**
+ * @description Method to query the current size of the queue, or to
+ * set a maximum queue size. This is the interface for _size().
+ *
+ * @method size
+ * @public
+ * @static
+ * @param {number} i - Specified maximum size of queue.
+ * @return number
+ */
+ _queue.size = _size;
+
+ /**
+ * @description Method for setting the queue to active. If there are
+ * transactions pending in the queue, they will be processed from the
+ * queue in FIFO order. This is the interface for _start().
+ *
+ * @method start
+ * @public
+ * @static
+ * @return void
+ */
+ _queue.start = _start;
+
+ /**
+ * @description Method for setting queue processing to inactive.
+ * Transaction requests to YUI.io.queue() will be stored in the queue, but
+ * not processed until the queue is restarted. This is the
+ * interface for _stop().
+ *
+ * @method stop
+ * @public
+ * @static
+ * @return void
+ */
+ _queue.stop = _stop;
+
+ /**
+ * @description Method for promoting a transaction to the top of the queue.
+ * This is the interface for _unshift().
+ *
+ * @method promote
+ * @public
+ * @static
+ * @param {Object} o - Reference to queued transaction.
+ * @return void
+ */
+ _queue.promote = _unshift;
+
+ /**
+ * @description Method for removing a specific, pending transaction from
+ * the queue. This is the interface for _remove().
+ *
+ * @method remove
+ * @public
+ * @static
+ * @param {Object} o - Reference to queued transaction.
+ * @return void
+ */
+ _queue.remove = _remove;
+
+ Y.mix(Y.io, {
+ queue: _queue
+ }, true);
+
+
+
+}, '3.0.0' ,{requires:['io-base','queue-promote']});
+
+
+
+YUI.add('io', function(Y){}, '3.0.0' ,{use:['io-base', 'io-form', 'io-xdr', 'io-upload-iframe', 'io-queue']});
+